Multiple control



Sept. 17, 1929. H. D. CURRIER" MULTIPLE CONTROL Filed April 2, 1925 iovPatented Sept. 17, 1929 PATENT ori-Fics 1).. GURRIER, OF CHICAGO.,ILLINGIS; ASSIGNOR-l TO KIELIJOGG SWITCHQBOARD ANID SUPlIAY COIIAIMY,vOE' CHICAGQ, ILLINOIS, A CGRPGMTIDI OIE- DELAWARE' Mln-Tm CQNTROLApplication. lfiled. yApriL .2,

jMy7 invention relates to., av multiple control device and. has to domore particularly withi theI multi-ple control of electrical coils suchasareused 'lin fconnection .with radio receiville; Setsthe primaries ofthe transformers adJustable in; relation: to their secondaries bettersthe resultsobtained from the receiving set espe.- cially in regard toselectivity and volume. The; coils may also be used as variable1ndluctances.

v lit is an obj ectof myinvention tofso design and arrange'the-fapparatusthat all. the pri-` maries Eof the transformers may beYadjusted in regardftoythesecondaries at thesame time and with an equa-lamountofnchangeiin every case. And to do.- all this by means of only onecontrol so as-tosigmplify the operation of thesetrand to malte-it mosteficient.

lVhen .the devices are used as variable indnctances part of the`windings are Aplaced on the vrotor and gpart on the stator, then whenthe rotors. areadjustedthe indncta-nce of each,individualydevice ischanged a cor-V responding amount.

The novel features mentioned abovev and others` not hereinbeforementioned will beV more fulty described iand explained: in thefollowing` specification and its appended claims. lnthe accompanyingdrawing, likev reference characters in the different views, denote likeparts, and:

Fig.. 1 is a view of an embodiment of my invention showing a pluralityof` transform-- panying drawing, A B and C represent radiov frequency`transformers, which comprise f tubes 2, and 4 for supporting thesecondlt haswbeen found that :making 1925. Serial No. 20,057.

ary windings S of the transformers A, B and C. and. whicharesupported inany suit* able manner as by means of supporting brackets as illustratedin Figru.. The transformer A .as .illustrated in Figs. '1. and 2 isshown with -the secondary winding S supported on the tube 2l andtheprimary wind-.- ing- P supported onf-the tube 119 tol clearly illustratethe relation .of the twowi-ndings S and P to each other. The: bracketfor sup,- porting the tubes 2, 3` and 4 whichsupport theA secondarywindings: S of the transform,- ers A, B and C is in the formof:aU-shaped supporting 4member 5 which .has lan orifice provided in`it-sv base f6. forY receiving a screw 74 which isinsertedfin a. suitableorifice pro vided in :the baseboard. 8, onv whiclr the trans formers.-are to be; mounted. A nut 9 having screw-threaded engagement with thescrew 7 is provided to securethe said -Ueshapedy supporting-.bracket to=the baseboard 8. The arms F andffb of the Ui-shaped member 5. are.provided with .suitable orifices inA their ends through .whichvareinserted screws 5 to secure the tube, on which: is wound thesecondary-windingof the transformer, to the U-shaped supporting member5. The secondary winding doeslnot coverall of the tube andthescrewfis'inserted through the tubeon oneL side of 'the' winding Attachedtothe tubes 2, 3 and lare supporting strips 10l which areyprovi'dedlwith suitable .orifices through "which extend shaftsf11, 12 and 18respectively. The shafts 11 and 12 are operativelyconnected-by acollar'lsand the shafts 12 andr13 are similarly cnnnectedvby a collar.15' which isl similar in every detail to thecolilar 14. rPhe collar 14is rovided' with a central orifice 16 intoy which. the ends.A 11"l and12*L of the shaftsv 11 and 12 are inserted. A pair ofy screws 17 and 17awhich have screw threaded engagement with tapped orifices. 18 and'18?'inthecollar 14 are provided. to secure ytheI shafts 11 and 12.andthe collar 14 together. -W'henthe screws 17 and 17.a arescrewedintothe tapped orifices `18 a-nd 18?L the ends ofthe screws 17and 17.a engage. .the ends 1liL and: 12?' ofl the shafts 11 and 12 andthus the shafts 11 and 12' are operatively Connected.

as may be readily understood. The collar 15 serves similarly to connectthe shaft-s 12 and 13 so when the shaft 11 is rotated, for purposeslater described, the shafts 12 and 13 will rotate with it as a whole. Itwill be readily seen that any number of transformers may be added andoperatively connected to the ones already provided.

The tubes 19, 20` and 21 upon which are wound the primary windings P ofthe .trans` formers A, B and C are provided with supporting brackets 22which are provided with orifices through which the shafts 11, 12 and 13,respectively extend. VThe tubes 19, 20 and 21 are supported onthecoupled shafts 11, 12 and 13 by thebrackets 22 and in associationwith their respective tubes 2, 3 and 4 and by means of suitable meanssuch as solder the brackets 22 are secured to the coupled shafts 11, 12and 13 so that when the coupled shafts `11, 12 and 13 are rotated as awhole the tubes 19, 20 and 21 rotate with the same to vary the coupling`between the primaries P and the secondaries S. The coupling provided, inthis embodiment of my invention, `between the primaries P andsecondaries S is of the type known as the 180 degree coupler. When theprimaries P are loosely coupled to the secondaries S they are in theposition shown in Fig. 1 with the axes of the tubes 19, 20 and 21 whichsupport the primaries P at. right angles to the axes of the tubes 2, 3and 4 which support the secondaries S. When the primaries P ofthetransformers A, B and C are closely coupled to the secondaries P thetubes 19, 20 land 21 which support the primaries P of the transformersA, B and C are concentric with the tubes 2, 3 and 4 which support thesecondaries S.

A member 23 is provided to support one end of the rod 11 and a rod 24which extends through a suitable orifice in the panel 25, and to whichit attached a knob 26 for the purpose of rotating the coupled shafts 11,12 and 13. The member 23 has an integrally formed portion or foot 27which is provided witha suitable orifice through which is inserted ascrew 28 which also passes through an orifice in the baseboard 8 and hasscrew threaded engagement with a nut 29, said screw 28 and nut 29serving to hold the member 23 in position. vThe upper end of the member23 is formed into a bracket 36 that has two upwardly extending portions37 and 38 which are at right angles to each other. Suitable orifices areprovided in the members 37 and 38 through which the respective ends ofthe rod 24 and shaft 11 extend. A bevel gear 30 is secured to the end ofthe shaft 11, that extends through the said orifice in the member 38,and meshes with a bevel gear 31 secured to the rod 24 which extendsthrough the orifice provided in the member 37. The bevel gears 30 and 31are secured to the shaft 11 and rod 24 by any suitable means such as aset screw 39 and the gears 30 and 31 also serve to prevent thelongitudinal movement of the shaft 11 and rod 24 and for this purposecollars 40 and 41 are integrally formed with the bevel gears 30 and 31and rest against the portions 37 and 38 of the bracket 36. The other endof the rod 24 extends through the panel 25 and to this end is fastened acontrolling member or knob 26 which when rotated causes the rod 24 torotate and through the medium of the bevel gears y3Oand 31 and thecoupled shafts 11, 12 and 13 the tubes 19, 20 and 21 which support theprimary windings P of the transformers A, B and C are rotated and theirpositions relative to the secondaries S are changed. The primaries P allrotate in unison when the coupled shafts 11, 12 and 13 are rotated andthe coils are provided with flexible leads, attached. to terminals, towhich terminals the outside connections are made.

A member 32, which has two integrally formed lugs 33 and 34 locateddiametrically opposite each other, is provided to limit the degree ofrotation of the primaries of the transformers A, B and C. This member 32is secured to the panel 25 and has a suitable orifice through which therod 24 is inserted. A collar 35 is provided on the rod 24 and is rigidlyfixed on the said rod 24 to prevent longitudinal movement and to limitthe degree of rotation of the said rod 24. A set screw 36 rigidlysecures the collar to the rod 24 and is of such a length that the headprojects a distance sufficient to allow it to engage with the lugs 33and 34 of the member 32. This will allow the collar 35 and the rod 24 tobe rotated through an arc of 180 degrees. Vhen the rod 24 is rotated inone direction the screw 36 engages the lugs 33 andy prevents the furtherrotation of the rod 24 and when the rod 24 is rotated in the otherdirection the screw 36 engages the lug 34 for a similar' purpose.Limiting the de- `gree of rotation of the rod 24 to a 180 degree arcalso limits the rotation of the primaries P of the transformers A, B andC to an equal amount.

While I have described my invention in association with radio frequencytransformers provided with coupled primaries P which are adapted to beloosely or closely coupled with their associated secondaries, it is tobe understood that the multiple control of my invention is alsoapplicable to variometers in which the rotor element windings may besimultaneously varied in relation to the stator windings as is wellunderstood without departing from the scope of my invention.

7hile I have described a preferred em-` bodiment of my invention I donot wish to be limited to such, as changes and modifications willreadily present themselves to one skilled in the art, but aim to coverall such modifications of my invention.

Having described my invention what I claim as new and desire to secureby United tates Letters Patent is:

i. In a device of the character described including a plurality oftransformers, tubes for supporting the primary and secondary windings ofsaid transformers, a shaft extending through the tubes supporting saidsecondary windings and supporting tabs on the same and aligned orificesin said tabs for rotatably supporting said shaft, means for securing thetubes supporting said primary windings on said shaft, a bracket alsosupporting said shaft, and means partially supported by said bracket forrotating said shaft for simultaneously varying said primary windingsrelative to said secondary windings.

2. In a device of the character described including a plurality oftransformers, supporting tubes for the primary and secondary windings ofsaid transformers, a shaft, tabs secured to said secondary supportingtubes and aligned orifices in said tabs for rot-atably supporting saidshaft, means on said primary supporting tubes for securing the same infixed position on said shaft, a rod, connecting means between said rodand said shaft for rotating said shaft for varying said primary windingsrelative to said secondary windings, and a bracket partially supportingsaid rod and said shaft and for limiting longitudinal movement of saidrod and said shaft.

3. In a deviceof the character described including a plurality oftransformers, supporting tubes for the primary and secondary windings ofsaid transformers, supporting brackets for the tubes supporting thesecondary windings, a shaft, tabs secured to said secondary supportingtubes and aligned orifices in said tabs for rotatably supporting saidshaft, means on said primary supporting tubes for securing the same infixed position on said shaft, a rod, connecting means between said rodand shaft for rotating said shaft for varying said primary windingsrelative to said secondary windings, means associated with said rod forlimiting the rotation of said rod, and a. bracket partially supportingsaid rod and said shaft.

t. A device of the character described including a plurality of coilsupports mounted in parallel planes, a shaft extending through said coilsupports, other coil supports attached to said shaft, means including arotatable member and gears associated with said rotatable member andsaid shaft for simultaneously varying said last coil supports relativeto said first coil supports,

and a member for supporting said rotatable member at right angles tosaid shaft.

5. A device of the character described including a plurality of coilsupports mounted in parallel planes, supporting members for said coilsupports, a shaft extending through said coil supports and at an anglethereto, other coil supports secured to said shaft, means including arotatable member and gears associated with said rotatable member andsaid shaft for varying the position of said last coil supports relativeto said rst coil supports, and a bracket holding one end of saidrotatable member in operative position relative to said shaft.

G. A device of the character described including a plurality of coilsupports mounted in parallel planes, supporting members for said coilsupports, a shaft extending through said coil supports and supportedthereby, other coil supports attached to said shaft, a rotatable memberand gears associated with said rotatable member and said shaft adaptedto simultaneously vary said other coil supports from the plane of saidfirst coil supports to a plane at right angles thereto and a bracketsupporting said gears, said rotatable member and said shaft, saidbracket preventing rectilinear movement of said gears.

7. A device of the character described including a plurality of windingsupports mounted in parallel planes, a shaft extending through saidwinding supports and supported thereby, a plurality of other windingsupports secured to said shaft and positioned within said firstwindingsupports, means including a rotatable member and gears associated withsaid rotatable member and said shaft for rotating said shaft therebychanging the position of said second winding support-s relative tosaidfirst winding support, a supporting member having supporting parts atright angles to each other, said supporting parts having orificesthrough which'said rotatable member and said shaft extend to positionthe same relative to each other.

8. A device of the character described including a plurality of windingsupports mounted in parallel planes, a shaft extending through saidwinding supports and at an angle thereto, other winding .supportssecured to said shafty within' said first winding supports, a secondshaft extending at right angles to said first shaft, means conneet-ingsaidvfirst shaft to said second shaft whereby when said second shaft isrotated, said first shaft operates to vary the position of one set ofwinding supports relative to the other set of said winding supports, anda member supporting said last means and partially supporting said shaft.

9. A device of the character described including means for supporting aplurality of windings, a shaft extending through said means and` at anangle tothe plane thereofn other means for supporting windings attachedto said shaft at an angle thereto for v rotation therewith, a supportingdevice for one end of said shaft, and a second shaft extending into saidsupporting device, power transmitting means connecting said shaftswhereby when one shaft' is rotated,

the other shaft is rotated to-change the position of said first meansrelative to said second means said supporting device limiting the rotaryand longitudinal movement of said shafts.

10. In a device of the character described comprising a plurality oftransformers, supporting means for the primary and secondary windings ofsaid transformers, U-shaped members positioning the supporting means ofthe secondary windings,

tabs secured to said secondary supports,-

alignedorifices in said tabs and a shaft supported in said orifices insaid tabs, said primaries secured on said shaft, and means for varyingsaid primary windings relative'to said secondary windings.

1l. In a device of the character described comprising a plurality oftransformers, supporting means'for theprimary and secondary windings ofsaid transformers, U-shaped bracketssupporting the supporting meansofthe secondary windings, tabsy secured to said secondary supports,

aligned orifices in said tabs and a shaft rotatably supported in saidaligned orifices in said tabs, means on said primary supports forsecuring the same on said shaft, and means for rotating said shaft? forvarying. said primary windingsrelative tol said secondary windings.

1Q. In a device of the-character described including a yplurality oftransformers, sup,- porting means for thev primary and secondarywindings of said transformers'.l a shaft, tabs secured to said secondarysupports and aligned orifices in said tabs for rotatably supporting saidshaft, means on said primary supports for securing vthe same to saidshaft, a rod, connecting means between-said rod and shaft for rotatingsaid shaft for varying said primary windings relative to. said secondarywindings, and a bracket partially supportingsaid rod and said shaft. v

Signed by me at Chicago, in the countyof-Cook and State of Illinois,this 31st-day of March, 1925.

HIRAM D. CURRIER.

